These math "brain teasers" are for everyone...bonne chance!
1) In how many 4-digit numbers is the sum of the digits 5?
2) Olga has a bag of balls, 10 of them are red, and the other 12 are white. She pulls a ball out of the bag. If it is red, she puts it back and puts another 5 red balls into the bag. If it is white, she puts it back and she puts 3 more white balls into the bag. When, after putting the balls into the bag, she has exactly 43 balls in the bag, she stops. How many red and how many white balls does she need to pull for this to happen?
1) In how many 4-digit numbers is the sum of the digits 5?
2) Olga has a bag of balls, 10 of them are red, and the other 12 are white. She pulls a ball out of the bag. If it is red, she puts it back and puts another 5 red balls into the bag. If it is white, she puts it back and she puts 3 more white balls into the bag. When, after putting the balls into the bag, she has exactly 43 balls in the bag, she stops. How many red and how many white balls does she need to pull for this to happen?